feat: upload support rootClassName

[kiner-tang]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	upload support rootClassName
🇨🇳 Chinese	上传组件支持 rootClassName

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

---

🚀 Summary

🤖 Generated by Copilot at 0c9d269

Add rootClassName prop to Upload component to allow customizing the class name of the root element. Update the component logic, tests, and documentation accordingly.

🔍 Walkthrough

🤖 Generated by Copilot at 0c9d269

• Add rootClassName prop to Upload component to allow customizing the class name of the root element (link, link, link)
• Update API documentation of Upload component in English and Chinese to include rootClassName prop and its type, description, and version (link, link)
• Add test case for rootClassName prop in upload.test.tsx file and generate snapshot (link)

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[github-actions]

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	386.67 KB (+6 B 🔺)
./dist/antd-with-locales.min.js	445.8 KB (+4 B 🔺)

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (6ca1b6d) 100.00% compared to head (d28870b) 100.00%.
Report is 29 commits behind head on feature.

Additional details and impacted files

@@            Coverage Diff            @@
##           feature    #44060   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          658       658           
  Lines        11166     11223   +57     
  Branches      3024      3047   +23     
=========================================
+ Hits         11166     11223   +57     

Files Changed	Coverage Δ
components/_util/wave/index.ts	100.00% <ø> (ø)
components/_util/wave/style.ts	100.00% <ø> (ø)
components/anchor/style/index.ts	100.00% <ø> (ø)
components/checkbox/style/index.ts	100.00% <ø> (ø)
components/config-provider/context.ts	100.00% <ø> (ø)
...date-picker/generatePicker/generateRangePicker.tsx	100.00% <ø> (ø)
...ate-picker/generatePicker/generateSinglePicker.tsx	100.00% <ø> (ø)
components/drawer/style/index.ts	100.00% <ø> (ø)
components/input-number/style/index.ts	100.00% <ø> (ø)
components/input/style/index.ts	100.00% <ø> (ø)
... and 13 more

... and 2 files with indirect coverage changes

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